heat resistant glass can be heat on the fire and very popular style will fit your eye. GLASS CUP IS MADE OF HEAT RESISTANT GLASS WICH CAN BE HEAT ON THE FIRE ,BUT IT CAN BE DESIGNED BY YOU ,IF YOU WANT TO DO THE ANY DESIGN ,YOU ONLY GIVE ME 2 DAYS ,WE WILL FINISH IT FOR YOU PHOENIX IS FAMOUS IN THIS AREA AND THAT HAS SPECILIZE IN THIS SERIES FOR TEN YEARS ADN SO WE CAN CONTROL EVERYTINGS WELL